Article Takedown/Update Request

This is an update request for the document by Wang Lihong and Duan Guilan

Your paper was deposited in CiteSeerX and appears online at http://www.jesc.ac.cn//jesc_cn//ch//reader//create_pdf.aspx?falg%3D1%26file_no%3D2009210313%26quarter_id%3D3%26year_id%3D2009
Before we are able to make any updates or deletions, you must ensure that the original record at this location is updated/removed.